Marketing expert
Lex Singer— SaaS Solopreneur · French LinkedIn creator
LinkedIn · 30k+ on LinkedIn · FR
Lex Singer is a French-speaking solopreneur who publicly documents building solo SaaS products and the associated LinkedIn content strategy, notably through the Buska.io project and several niche tools.
Also known for
- Build in public (French-speaking)
- Niche-first SaaS
Style fingerprint
Post length
Variable — short (200 chars) to long (1,800 chars)
Hook
Concrete revenue figure or explicit product decision
Structure
Product anecdote + metrics + lesson learned
Vocabulary
Technical but accessible, French with standard English loanwords
Lex Singer belongs to the generation of French-speaking solopreneurs who imported the Anglo-Saxon "indie hacker" model into France: niche SaaS products built alone, distributed primarily via LinkedIn and X, with MRR publicly documented.
His LinkedIn content method reflects his craft: concrete product/behind-the-scenes ratios (churn rates, monthly revenue, technical choices), with few general-opinion posts. That specificity — showing a real product running rather than talking about building in the abstract — is what allows a modest audience (~30,000 followers) to convert into paying SaaS customers at a rate that outperforms many audiences ten times larger.
His positioning is valuable for French-speaking founders who are hesitant to go solo: he offers a realistic model to identify with, halfway between an agency and a bootstrapped SaaS, with a level of granularity (process, stack, pricing) that is rarely shared publicly in the French ecosystem.
In the getchatsocial.com product
getchatsocial.com includes a 'build in public' format in its LinkedIn generator, which structures posts around a concrete figure (MRR, churn, conversion) + a product decision + a lesson learned — the pattern Lex Singer applies systematically.
Frameworks & methods
Build in public (French-speaking)
Public documentation in French of a solo SaaS product's revenue, technical choices, and mistakes — a response to the dominant Anglo-Saxon model.
Niche-first SaaS
An approach of targeting a very narrow segment (a tool for one specific use case) rather than a horizontal market, in order to reach profitability with a modest audience.
FAQ
Who is Lex Singer?
Lex Singer is a French-speaking SaaS solopreneur who publicly documents the solo product-building journey on LinkedIn, including Buska.io and several niche tools.
What does Lex Singer build?
He operates several bootstrapped niche SaaS products, including Buska.io, and publicly shares the associated revenue, metrics, and technical decisions.